When you feel it's safe, and when you feel very comfortable around your partner. You should also be somewhat comfortable about talking about sex. A good maturity level would be good to have first, many people think the age of 14 is a too young age, but it depends on how mature you are at the time.
Remember that you never have to have sex with a person, or do ANYTHING against your will! You should never hurt your partner and he/she should never hurt you.
Also remember to use a condom, to prevent getting infected with an STD, and so you don't get pregnant.
If everything isn't great the first time, don't worry, it'll be better when you're less nervous.
When she has stayed for long without getting intimate with a boy
If you get "intimate" enough, it's possible though unlikely.
U sHould talk to ur parents about that.but don't have sex if ur not ready for it.
about age 12
About
Patients should start getting screened for cervical cancer at age 21.
Well unless your quite bigish i think the age a person should be getting a double bed is at the age of 13.
Stockings and garters. No need for them to come off when getting intimate. In fact, it adds to the "experience".
an intimate friend
at age 76 you should be getting between 10 and 12 hours of sleep each night
Puberty starts at 12 in boys. So you should grow big nearly at the age of 15
To become physically sexually intimate with someone.